Device for pushing back ores into the interior of mechanical muffle roasting-furnaces



R. V. ZELEWSK I AND H. SIEGEL. DEVICE FOR PUSHING BACK ORES INTO THE INTERIOR 0F MECHANICAL MJUFFLE' ROASTING FURNACES.

APPLICATION FILED JULYZO, 917.

Patented May 4, 1920.

r MA. w. 9 Z a n Z 2 z W x smash STAT-as PATENT ROMAN V. ZELEWSKI AND I-IERMANN SIEGEL, OF ENGIS, BELGIUM.

DEVICE FOR BUSHING BACK ORES INTO THE INTERIOR OF MECHANICAL-MUFFLE ROASTING-FURNACES.

' a subject of the King of Prussia, residing at Engis, Villa dEhein, in the Kingdom of Belgium, and HERMANN SIEGEL, a subject of the King of Prussia, residing at Engis, Grande Route,in the Kingdom of Belgium, have invented certain new and useful Improvements in Devices for Pushing Back Ores into the Interior of Mechanical Muifle Roasting-Furnaces; and we do hereby declare'the following to bea full, clear, and exact description of'the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Roasting ores by means of mechanical devices in mufiie-roasting-furnaces such as the hand-roasting-furnaces nowadays in use has hitherto been connected with difficulties in so far as at the ends of thereciprocating mechanical device for'stirring up the ores, heaps of ores accumulated which did not get into the interior of the furnace but got cool at the places of accumulation.

These cold ores were therefore not roasted sufiiciently and eventually became a hindrance to the stirring deviceswhen the heaps had became too high. Besides, they got mixed with the ores which had already been well roasted, and thus spoiled the latter by mixing them again with unroasted V sulfur.

The present invention has for its object to avoid the afore-mentioned disadvantages and difliculties. It relates to a device by means of which mechanical muflie-roastingfurnaces, such as the hand-roasting-furnaces of Maletra Hasenklever, Liebig Eichhorn and similar roasting-furnaces, are made usable for practice.

Another object is to make all mechanical parts easilyaccessible and allow them to get always rapidly cooled in their starting position.

By means of the new device any accumulated heaps of ores can at necessity or regularly be pushed back into the lnterior of the furnace.

The invention is illustrated by way of example in the accompanying drawings, in which:

Figure 1 is a plan view of the device,

Figs. 2 and3 are... side views (partly in Specification of Letters Patent.

Patented May 4, 1920.

Application filed July 20, 1917. Serial No. 181,931.

section) of the device with parts in different positions.

Referring now to the drawings, in which like numerals of reference denote the same parts throughout all views, it will be noted that the new device is illustrated as applied to a stirrer. 1 of any well-known construction. 2 are the drawing-bars by means of which the stirrer can be moved to and fro in the furnace across the ores for stirring up the latter. At a certain distance behind the stirrer 1, the bars 2 are connected with each other by a cross-barf. The cross-bar 3 is attached to the drawingbars .Qby means of bearing-like members 4. These members are provided at their inner sides with vertical recesses 5 constituting sockets in which an elongated comb-like plate 6 is mounted. The plate is provided at its ends with pivots 7 which are received by the said .recesses 5, these recesses being of such dimensions that the pivots have'enough play upwardly and laterally for allowing a free movement of the comb-like plate. The upper portion of the plate 6 is thickened on its entirelength as at 8 (Figs. 2 and 3). This portion tends, by its weight, to turn the plate 6 in one direction or the other. On the side facing the cross-bar 3 the said portion is provided with a projection 9 whichcan engage the cross-bar, so that the comb will be held in the inclined position A shown in Fig. 2; in this position the plate will reach nearly to the bottom of the furnace.

When the stirrer is moved into the interior of the furnace and the plate 6 is in the position A (Fig. 2) it will push the ores intothe inner room of the furnace, where they are submitted to a goodroasting effect. When the stirrer is withdrawn, the plate 6 will engage the bottom of the furnace and thereby will be automatically tilted at once into the position B (Fig. 3). In this position the comb will, on its way back, pass across the ores without coming into contact with the same, and as soon as it comes into its starting position it will again be brought into position A by some suitable stop 50, adapted to be positioned to engage the lug 9, on the comb 6. If the device is in the position A it can again be moved forward for pushing new heaps of ores into the furnace. The said stop is so constructed that it can also be put into inoperative position, so that when the stirrer is reciprocated. across the ores, the comb 6-will remain in-position B and glide over the ores without affecting the same. Only in case ofnecessity, i. e. as soon as the ores have accumulated to a sufficiently high heap, is the stop again brought into operative position, so that the. comb will operate in position A in the manner described. While the device is shown in connection with a stirrer, it will be evident that it can also be constructed as an independent de- H vice which can be used in the same'way and will have the same effect asthat described and illustrated.

It will further be evident that we do not wish to restrict ourselves to the form described and shown and that many changes can be made in the construction of the devicewithout departing from the spirit ofour invention.

What we claim as new and desire to secure by Letters Patent is 1. In an apparatus of the class described, the combination of a furnace, a frame mounted in the furnace to reciprocate, a plurality of fixed stirring devices depending from the inner end of the frame, a bar having trunnions and extending across the frame, bearings formed in the frame to receive the trunnions, a comb depending from the bar, the trunnions being disposed near the bottom of the bar, the weight of the bar above the trunnions causing said bar and the comb to tilt by gravity beyond a medial line, and means on the frame to limit the rocking movement of the comb and bar in either direction of movement of the frame. 2. In an apparatus of the class described, the combination of a frame, stirring devices depending from therear end of the frame,

a comb pivotally supported in the frame and vweighted to. tilt whenflpast a-vertical position, means for limiting the tilting ofthe comb, thecomb being tiltedby. contact with.

the fuel when the frame is withdrawn, and means. for automatically reversely tilting thecomb to operative position when the apparatus is withdraw-11 to normal position.

7 An apparatus of the class described, comprising a pair of longitudinal side bars, a transverse bar connecting the side bars, a comb pivotally mounted in the sidebarsadjacent the transvers'e bar, and normally in an inclined position, the bottom ofthe comb being positioned to engage the. floor of a furnace when the apparatus pushed inwardly, said comb being reversely tilted by the bottom engaging with the floor of. the furnace when the apparatus is withdrawn, and automatic means for resetting'the comb atabout the time the apparatus ,is lllylilS initial position.

4:. An apparatus of the class .described, comprising a frame formediwith opposite alinedelongated bearings, a weighted bar having trunnions supported in the elongated bearings, a comb dependingfromthe bar, thebottom of the comb adapted to rest upon the fioor of a furnace, whereby when the apparatus is forced into a furnace, the comb 1 Wlll engage the material'therein'and move 

